Make it easier to find version specific docs. (#1260)

* Sketch of the H5S life cycle.

* Committing clang-format changes

* Fix H5S_UNLIMITED snafu.

* Updated RM template and RM page.

* Added H5S life cycle.

* Committing clang-format changes

* Added H5T life cycle.

* Committing clang-format changes

* Cleaner layout (?)

* Cleaned the H5F life cycle. Called out unfinished biz.

* Committing clang-format changes

* Remaining life cycle skeletons.

* Committing clang-format changes

* Committing clang-format changes

* Added H5Z life cycle.

* Committing clang-format changes

* Added H5G life cycle.

* Committing clang-format changes

* H5 and H5I life cycle updates.

* Committing clang-format changes

* Added H5PL life cycle.

* Committing clang-format changes

* Added H5L life cycle.

* Committing clang-format changes

* Fix for Chris' comment.

* Add a variable for Doxygen pre-processor definitions.

* Forgot to add the H5M API.

* Clarify the H5Z life cycle.

* Committing clang-format changes

* Add H5Zdevelop.h to Doxygen.in. Added H5I life cycle.

* Committing clang-format changes

* Clarified introduction and fixed missing label declaration.

* Added H5O life cycle.

* Committing clang-format changes

* H5O cleanup, part 1.

* Committing clang-format changes

* Cleaned up some of the endless repetition in H5O.

* Committing clang-format changes

* Cookbook & RFC draft layouts.

* Updated manifest.

* Updated the manifest, the example paths, and sketched the 1st recipe.

* Committing clang-format changes

* Outlined two more recipes.

* Committing clang-format changes

* More recipes and RFCs.

* Committing clang-format changes

* Draft of templatized RFC references.

* Another batch of RFC changes.

* Another batch of RFCs.

* Fixed reference.

* RFCs in reverse chronological order.

* First cut of RFCs.

* Fixed reference.

* Updated recipes.

* Updated recipes.

* More RFCs.

* Updated D*PL comments.

* Added H5P descriptions.

* Committing clang-format changes

* H5R life-cycle snapshot.

* Committing clang-format changes

* H5R life-cycle. Added line numbers to life-cycle examples.

* Committing clang-format changes

* Fixed formatting for H5Dchunk_iter().

* Added comment on collective mode requirement w/ compression.

* Simplified API compat. macro dox.

* More API vers. updates.

* Hide the async macro entrails.

* Latest VFD SWMR RFC.

* Create a tag file for permalinks.

* Added TODOs for metadoc.

* Removed duplication.

* Revised RM landing page.

* Trimmed more duplication.

* Committing clang-format changes

* Revised H5D.

* Committing clang-format changes

* Updated survey link.

* Added Doxygen RM entry template link.

* Added the "Multi-Thread HDF5" RFC.

* Added DOXYGEN_TAG_FILE.

* Added selection I/O RFC.

* Added the VFD Sub-filing RFC.

* Updated meta-documentation and added two old presentations.

* Added a few more RFCs (4).

* Fixed MANIFEST.

* Updated meta-documentation.

* Added Filters technical note.

* Fixed MANIFEST.

* Restore the path stripper.

* Experimental full-text search via Google.

* Better full-text search integration.

* Whoops. Forgot this one.

* Oh boy.

* Make CMake happy.

* Added "Debugging HDF5 Applications" technical note.

* Another batch of RFCs.

* Fixes for #1221.

* Updated overview.

* Fixed image dependencies.

* CMake updates.

* Fixed SET.

* Better?

* Update doxygen/dox/Overview.dox

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Larry Knox <lrknox@hdfgroup.org>

3 files changed, 27 insertions, 12 deletions

diff --git a/configure.ac b/configure.ac
index 556e565..2520249 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1220,7 +1220,7 @@ if test "X$HDF5_DOXYGEN" = "Xyes"; then
   DOXYGEN_HTML_HEADER='$(SRCDIR)/doxygen/hdf5_header.html'
   DOXYGEN_HTML_FOOTER='$(SRCDIR)/doxygen/hdf5_footer.html'
   DOXYGEN_HTML_EXTRA_STYLESHEET='$(SRCDIR)/doxygen/hdf5doxy.css'
-  DOXYGEN_HTML_EXTRA_FILES='$(SRCDIR)/doxygen/hdf5_navtree_hacks.js $(SRCDIR)/doxygen/img/ftv2node.png $(SRCDIR)/doxygen/img/ftv2pnode.png'
+  DOXYGEN_HTML_EXTRA_FILES='$(SRCDIR)/doxygen/hdf5_navtree_hacks.js $(SRCDIR)/doxygen/img/FF-IH_FileGroup.gif $(SRCDIR)/doxygen/img/FF-IH_FileObject.gif $(SRCDIR)/doxygen/img/FileFormatSpecChunkDiagram.jpg $(SRCDIR)/doxygen/img/ftv2node.png $(SRCDIR)/doxygen/img/ftv2pnode.png $(SRCDIR)/doxygen/img/HDFG-logo.png $(SRCDIR)/doxygen/img/IOFlow2.gif $(SRCDIR)/doxygen/img/IOFlow3.gif $(SRCDIR)/doxygen/img/IOFlow.gif $(SRCDIR)/doxygen/img/PaletteExample1.gif $(SRCDIR)/doxygen/img/Palettes.fm.anc.gif'
   DOXYGEN_TAG_FILE=hdf5.tag
   DOXYGEN_SERVER_BASED_SEARCH=NO
   DOXYGEN_EXTERNAL_SEARCH=NO
diff --git a/doxygen/CMakeLists.txt b/doxygen/CMakeLists.txt
index 3462d50..920fafa 100644
--- a/doxygen/CMakeLists.txt
+++ b/doxygen/CMakeLists.txt
@@ -21,7 +21,7 @@ if (DOXYGEN_FOUND)
   set (DOXYGEN_HTML_HEADER ${HDF5_DOXYGEN_DIR}/hdf5_header.html)
   set (DOXYGEN_HTML_FOOTER ${HDF5_DOXYGEN_DIR}/hdf5_footer.html)
   set (DOXYGEN_HTML_EXTRA_STYLESHEET ${HDF5_DOXYGEN_DIR}/hdf5doxy.css)
-  set (DOXYGEN_HTML_EXTRA_FILES "${HDF5_DOXYGEN_DIR}/hdf5_navtree_hacks.js ${HDF5_DOXYGEN_DIR}/img/ftv2node.png ${HDF5_DOXYGEN_DIR}/img/ftv2pnode.png")
+  set (DOXYGEN_HTML_EXTRA_FILES "${HDF5_DOXYGEN_DIR}/hdf5_navtree_hacks.js ${HDF5_DOXYGEN_DIR}/img/FF-IH_FileGroup.gif ${HDF5_DOXYGEN_DIR}/img/FF-IH_FileObject.gif ${HDF5_DOXYGEN_DIR}/img/FileFormatSpecChunkDiagram.jpg ${HDF5_DOXYGEN_DIR}/img/ftv2node.png ${HDF5_DOXYGEN_DIR}/img/ftv2pnode.png ${HDF5_DOXYGEN_DIR}/img/HDFG-logo.png ${HDF5_DOXYGEN_DIR}/img/IOFlow2.gif ${HDF5_DOXYGEN_DIR}/img/IOFlow3.gif ${HDF5_DOXYGEN_DIR}/img/IOFlow.gif ${HDF5_DOXYGEN_DIR}/img/PaletteExample1.gif ${HDF5_DOXYGEN_DIR}/img/Palettes.fm.anc.gif")
   set (DOXYGEN_TAG_FILE ${HDF5_BINARY_DIR}/hdf5.tag)
   set (DOXYGEN_SERVER_BASED_SEARCH NO)
   set (DOXYGEN_EXTERNAL_SEARCH NO)
diff --git a/doxygen/dox/Overview.dox b/doxygen/dox/Overview.dox
index 3b190d6..e9c52c2 100644
--- a/doxygen/dox/Overview.dox
+++ b/doxygen/dox/Overview.dox
@@ -3,12 +3,11 @@
 
 This is the documentation set for HDF5. You can
 <a href="hdf5-doc.tgz">download</a> it as a tgz archive for offline reading.
-
-This is the documentation set for HDF5 in terms of specifications and software
-developed and maintained by <a href="https://www.hdfgroup.org/">The HDF
-Group</a>. It is impractical to document the entire HDF5 ecosystem in one place,
-and you should also consult the documentation sets of the many outstanding
-community projects.
+This documentation includes specifications and documentation
+of software and tools developed and maintained by
+<a href="https://www.hdfgroup.org/">The HDF Group</a>. It is impractical to document
+the entire HDF5 ecosystem in one place, and you should also consult the documentation
+sets of the many outstanding community projects.
 
 For a first contact with HDF5, the best place is to have a look at the \link
 GettingStarted getting started \endlink page that shows you how to write and
@@ -19,12 +18,28 @@ technical documentation consists to varying degrees of information related to
 <em>tasks</em>, <em>concepts</em>, or <em>reference</em> material. As its title
 suggests, the \link RM Reference Manual \endlink is 100% reference material,
 while the \link Cookbook \endlink is focused on tasks. The different guide-type
-documents cover a mix of tasks, concepts, and reference, to help a certain
+documents cover a mix of tasks, concepts, and reference, to help a specific
 <em>audience</em> succeed.
 
-Finally, do not miss the search engine (top right-hand corner)! If you are
-looking for a specific function, it'll take you there directly. If unsure, it'll
-give you an idea of what's on offer and a few promising leads.
+\par Versions
+     Version-specific documentation (see the version in the title area) can be found
+     here:
+     - HDF5 <code>develop</code> branch (this site)
+     - <a href="https://docs.hdfgroup.org/hdf5/v1_12/index.html">HDF5 1.12.x</a>
+     - <a href="https://docs.hdfgroup.org/hdf5/v1_10/index.html">HDF5 1.10.x</a>
+     - <a href="https://docs.hdfgroup.org/hdf5/v1_8/index.html">HDF5 1.8.x</a>
+
+\par Search
+     If you are looking for a specific function, constant, type, etc., use the
+     search box in the top right-hand corner!\n Otherwise, check out the
+     \link FTS full-text search\endlink.
+
+\par Offline reading
+     You can <a href="hdf5-doc.tgz">download</a> it as a tgz archive for offline reading.
+
+\par History
+     A snapshot (April 2017) of the pre-Doxygen HDF5 documentation can be found
+     <a href="https://hdfgroup.github.io/archive/hdf5doc/">here</a>.
 
 \par ToDo List
      There is plenty of <a href="./todo.html">unfinished business</a>.